Governing mechanism for fluid-pressure engines.



H H. DOW. GOVERNING MECHANISM FOR FLUID PRESSURE ENGINES.

APPLICATION FILED AUG. 6, 1904.

. atented; New. 29, 3910.

2 SHEETS-'3HEET 1.

Imam-cm L w"? ATTORN EYS ENGINES POI-l rLUID PEESSU 31mm]; AUG. 6. 1904.

GOVEENHTG MEGHAT APPLIUATIO n ml. .41 .115. w

DOW", O35 MIDLAIFD, MICHIGAN.

me i m r s W niruwrfpm in and i one Application filed August 8,

Specification of Letters Iaccnt.

Pa'lsen'l ed Nov.

1904. Serial. no, e19,7eu.

. To all whom 513 mu; (macro e rc 'uro .lflngines oi which Mu inve t y lo lluid-prcssure engines and 4 for mu- CU ll to provide nietipensive piable eilccl'lvo designed for up; sicam turbines an for convenerce of dcscriplion, l have illustrated it appli l to engines o'l this character. It is an" intention, hmvever. to utilize the invention in connection with any fiuid-pressiue en ine, --.vl'iel,hcr oil} the rotary or rcoiprocao type, for which it m be found applicable and in connection m; which. may be useful; and lherciio n ire 1o be undcrsltood ihai {my descri ive language employee in. the specific-a n which may seem to limit she in venlion to steul'u turbines nor' bo be emisiruel cmbodyinpsuch linii. lotion.

In. the drawii l is a sectional view of the preferred form of governing apparatus and a portion of one end of a steam turbine co which the apparatus is applied. Fig. 3 is a View in side elevation of the parts shown in Fig. 1, also showing the connections belween the main governing parts and lhe inlet valve of the turbine. Figs. 3 and are views corresponding to Fig. 1, but illustrating modifications of the governing appuratus.

Referr ng;- now particularly to Figs. 1 and 2 of the drawings. the shaft 1 of lhe turbine is nrovidcd, a1: one end, with a disk 8 which is rigidly fastened to the end of the shaft by means oi bolts l: and is provided with a central recess 5, from which extend outwardly pluralily of radial passages or ducts (i, the older ends of these passages or ducts terminating" in she atmosphere. The

on? r l'nce oil lhc disk 3 is provided with a plurality of concentric rings 7 which alien hole and inlcrmesh with similar rings stationary dish 9, which is provide a cent 10 to c oer-use with L.

ducts (3 communicate.

ccss 5 in the disk 3 in forming a suitable chamber with which the inner ends of the The stationary disk 9 provided with a yluralihy of arms 11., the free ends of which are bellied or other wise suitably faslcnm'l to bosses 12 which projecc from the turbine casing. One end of apipe 13 is connected to the clnunber 5-l0 and its other end is connccl'ed to a pair of hollow disks 1-d: f0l1'11(3l of flexible nuitcrial and l'laving laterally projecting sle-ins L3 and ll": which are respectively support d in suitable standards 17 and 11S and lh, latter of which constitutes a piston valve. The surfaces of the disks Ll are shown as oil. oorruguled form. though. they may have smooth surfaces, if desired. I

The other end oilxhe stem 16 is provided with a hook 19 which connecl's with one end of a coil spring 24). the other end of the The stem 1o constitutes a piston valve hav ing two reduced porl'ions 24 and The bearing poriion 26 of the standard 18, which constitutes a chamber for the valve 16, is provided with a central port 2-7 to "which is connected a pipe leading from any suitable source of lluid-prcssure-such, for example. as The boilcr or the main pipe leading therefrom lo supply the turbine with steam. The part, so is also provided with two ports 29 and 30 that open to the atmosphere and with two ports 31 and 32 that are respectively located intermediate the ports 27 and 29 and the ports 29 and 30. l icadinc from the ports 31. and 3:2, respectively, are pipes 33 and 3d which extend to n cylinder 35 at opposite sides of a piston 36, which is conncctedto and controls the operation of the turbine inlet Valve 87.

The operation of the invention thus far described is as follows: Aslhe disk ills rigidly connected to the engine shall, il' will rotate at the same speed as the shaft and will act in the manner of a centrifugal pump or exhausting dcvico: lhat is the air willv be forced outward from l'he passages 6, by centrifugal acliom and thus create a partial vacuum in the chamber 5-10. Since the chandler 5-.1O is connected to the hollow, flexible dishs ll; by the pipe 13 and the stem 15. partial nefllllill will be formed in the 5 to place the port 27 in communication with the port 31 and thus introduce fluid-pressure through the pipe 33 to the cylinder-35 below the piston 36, to close the inlet valve- 37. The same adjustment of the'stem will obviously place the ports 30 and 32 in communication with each other and therefore permit the space in the cylinder 35 above the cylinder 36 to exhaust to the atmos phere. I

The parts may obviously be so adjusted with reference to each other that the slowing-down of the engine to a given low rate of speed will serve to put the port 27 into communication with the port 32 and at the 20 same time put ports 29 and 31 into communication with each other, whereby the fluid-pressure in the pipe 28 will be transmitted through the pipe 34 to the cylinder 35' above the piston 36, and, at the same time, the fluid-pressure in the cylinder 35 below the piston 36 will be exhausted, through the pipe 33 and the corresponding ports, to the atmosphere.

Referring now to Fig. 3, the shaft 1 is provided with a disk 3 having a central recess 5 and radial ducts 6 leading therefrom to the atmosphere, the same as in the construction shown in Fig. 1, but in this case the recess 5 is closed, to form a chamber, by means of a cap 38 that is rigidly connected to the disk 3* and therefore rotates therewith. This cap 38 is provided with a hub 39 which has a bearing upon a hollow rod or tube 40, the latter being provided with a fitting 41 through which connection is made by means of a pipe 42 to a chamber 43 having at one side a flexible wall or diaphragm 44. This diaphragm 44 is connected toa stem 16 which corresponds in structure and functions to the stem 16 of Figs. '1 and 2, and since this device and the various'parts which cooperate therewith are the same, both structurally and functionally, as the corresponding parts heretofore described, they are given the same reference ,characters and the description heretofore given may be read in connection therewith, without the necessity of repetition. The position of the diaphragm 44 and the degree of'inovement thereof under the action of the partial vacuum produced'in the chamber 43 may be regulated by means of a coil spring 45 and a hand-wheel 46, as will be readily understood.

In Fig. 4 the disks 3 andv 9" correspond to the parts 3 and 9 of Fig. 1, except that the rings 7 and 8, which constitute packing devices, are omitted. In this modification, the pipe 42 connects, as in Fig. 3, with a cham- '55 her 43 having a corrugated, flexible diaphragm 44", a spring 45 and a hand-wheel 46 being rovided to operate in the same way and effect the same results as the corresponding parts 45 and 46 in Fig. 3. In this'moditication, a supplemental chamber 47, having a diaphragm 48, is provided, as is also an air chamber 49, the chambers 47 and 49 having respectively ports or openings 50 and 51 which may be placed in communication with each other or cut off from such communication by means of a tubular valve 52, the outer end of which is connected to the diaphragm 44 of the chamber 43 The cylinder in which the tubular valve 52 operates and of which the port 51 constitutes apart is provided with a port or outlet 53 to the atmosphere, and the reduced portion 54 of the tubular valveserves to put this port 53 into communication with the portor outlet 50 when the valve 52 is moved The diaphragm 48 is connected,

bular valve 52, in the chamber 49. The atmospheric pressure upon the diaphragm 44" will serve to move the tubular valve 52 and thus put the chamber47 into communication with the chambers 49 and 43 and the at mospheric pressure upon the diaphragm 48 will act to move the lever 55 and therefore the inlet valve of the engine to which it is connected, by means of the rod or cord 56.

A decrease in the speed of the engine beyond a given limit will serve to so reducethe degree of vacuum in chamber 43 that the diaphragm 44 will move the tubular valve 52 so as to place the chamber 47 in communication with, the atmosphere and thus restore the diaphragm 48 and the parts connected thereto to their normal positions.

Other variations from what is shown may bedevised within the scope of my invention, and Itherefore desire itto be understood that the invention is not to be-restricted, except as limitations may be imposed by the prior art. i

I claim as my invention:

1. In a speed governor for fluid-pressure engines, the combination with the engine shaft and a disk mounted thereon and provided with a recess or chamber and with passages or ducts branching outwardly therefrom to the atmosphere, of a chamber having a flexible wall or diaphragm and in communication with said disk chamber, and means governed by the movements of said engine a speed governor comprising a centritugal pump attached to the engine shaft, a chamber having a flexible wall or diaphragm, an air conduit between said pinup and said chamber, a valve operated by the movement of said diaphragm and fluid pressure connections governed by-said valve to control the fluid supply to said engine in accordance with the speed. i

4. In a fluid-pressure engine, the combi nation with a suction device comprising a centrifugal pump attached to and operated by the engine shaft, of a chamber having a flexible wall or diaphragm, a connection'between said suction device and said chamber, a tluid-pressure-actuated inlet valve fort-he engine and a spring adjusted valve connected to said flexible wall or diaphragm for controlling said flnid-pressure in accordance with the speed of the engine.

5. In a fluid-pressure engine, the combination with a disk having a central recess and radial passages or ducts leading therefrom to the atmosphere and means for fastening said disk to the engine shaft, of a stationary disk adjacent to the first named disk and having a. recess cooperating with the central recess in said disk to form a chamber, a chamber having flexible walls one of which is connected to said chamber by a passage, a valve connected to the other flexible wall of said chamber, an inlet valve for theengine having a controlling piston, and fluidp "re (amnections to the two sides of saiu piston which are controlled by the val e which connected to the said flexible wall or diaphragm.

6. In a fluid-pressure engine, the combination with a disk fastened to the engine shaft and having a central recess and radial passages or ducts lemling therefrom to the atmosphere and having a plurality of annular ribs on its outer face, of a stationary disk barring a plurality of annular ribs that interniesh with the ribs on the rotating disk, one or more chambers having flexible walls, said chambers beingin connnunication with the chat -ber formed between the stationary disk and the rotatal'ile disk,'an inlet valve for the engine having a governing piston,

fiuid-presslire connection with the two sides of the piston and a governing valve for said fluid-pressure which is connected to onegof the flexible walls or diaphragms and is actuatedthe eby in accordance with the speed essi'i'reengme tion' with are pufnpq p .the-engineshaft; of an adjustablei etjvalve for "the".enginefand means intermediate said. pump 'and the inlet v lve "embodying air iiipump acts-"to adjust the.inletyalvefto control the enginefspcedf f 8. In combination with a fluid-pressure engine, a speed governing-1v comprising a pump operated-by the engine shift, a chamber having a flexible wall or diaphragm, an air conduit between said pump and said chamber and means controlled by the fluctuations of said diaphragm for controlling the fluid supply to the engine in accordance with the speed. I

9. In combination with a fiuid pressure engine, a speed governor, comprising a pump operated by the engine, a chamber having a flexible wall or diaphragfn, an air conduit between said pump andv said'cham her, a valve operated by the fluctuations of said diaphragm-and means 0 erated by said valve for controlling the flui supply to said engine in accordance with thespeed.

10. In combination vvith'afluid v pressure engine, a governing device, comprising a pump, a diaphragm subjected to the-action of said pump, a controlling valve operated by the fluctuations of said j dia hragm, a

supply valve for said engine. a va ve operating piston and means dependent on this, fluctuations of said diaphragm for operating said controlling valve and opening and closing said supply valve.

11. In combination with a fluid-pressure engine, a governing device, comprising a pump, a chamber having a flexible wall. or diaphragm, an air conduit; between said pump and said chamber, a pilot .valve operated by the fluctuations of said diaphragm, .an engine supply valve provided with a valve operating motor and fluid pressure connections governed by said pilot valve for controlling the operation 0 valve. I

12. In combination with a fluid pressure engine, a governing device comprising an exhaust pump operated synchronously with the engine, and an agent subjected to the sucking action of said pump for controlling the supply of motive fluid delivered to said engine.

13. In con'ibination with a pressure engine, a pump operated by the engine shaft, an inlet valve for said engine, an element connected to said valve, means operated by said pump for admitting pressure to either said supply side of said element and for simultaneously I side of said element and for exhausting 10 exhausting from the other side. from the other side.

14. In a fluid pressure engine, the combi- In testimony whereof, -I have hereunto nation with a pump operated b the engine subscribed my name th1s 28 day of June,

shaft, an inlet valve for contro ling the de- 1904. Y

livery offluid-to .said engine, an element 1 HERBERT H. DOW. connected to said valve, means intermediate Witnesses:

said pump and said element and operated G. L. CAMP,

by the pump for admittingpressure to either 'J. LE Fnvnn. 

